![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to README CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [Research Unix] / researchv10no / cmd / cfront / libC / ooiostream|
Return to README CVS log | Up to [Research Unix] / researchv10no / cmd / cfront / libC / ooiostream |
1.1 root 1:
2: Cycle 13
3:
4: Change typedef in strstream.c to avoid use of size_t. (This is
5: because of header file compatibility problems.)
6:
7: Change exit(10) to abort() in oldformat.c.
8:
9: Cycle 12
10:
11: Put in include of <iostream.h> in strstream.h
12:
13: Change istream::get() so that it really gets expanded inline.
14: Previous definition was being outlined.
15:
16: Reorder declarations so that ipfx comes before any operator>>. Not
17: just before the ones that have inline code refering to it. The old
18: ordering was resulting in a failure to expand ipfx where it should
19: have been.
20:
21: Move declaration of ios_user_union higher in stream.c in order to
22: eliminate a new warning message.
23:
24: Change values of O_CREAT O_TRUNC O_EXCL in cases where headers don't
25: define them (the only known such system is V9)
26:
27: Fix ostream::out_waiting. It was just returning non-zero when there was stuff
28: accumulated but not consumed. It was supposed to return the number
29: (at least according to the man page.)
30:
31: -----------------------------------------------------
32: Cycle 11
33:
34: Change cstreams.c for change to way explicit placement works.
35:
36: Implement bidirectional strstream.
37:
38: ----------------------------------------------------
39: Cycle 9
40:
41: Fix bug in void* inserter. (Showbase should have been set
42: but wasn't)
43:
44:
45: --------------------------------------------------
46: Cycle 8
47:
48: streambuf::snextc was not incrementing the get pointer before
49: it called underflow. This had no effect because the streambuf
50: classes assume that when underflow is called there
51: was nothing in the buffer. The man page said that although this
52: was "normally the case" but doesn't guarantee it. I wrote a new
53: streambuf class that checked for the condition and it failed.
54: I've fixed snextc.
55:
56: ---------------------------------------------------
57: Cycle 7
58:
59: Fix bug in setstate.
60:
61: Change return type of filebuf::close to filebuf*
62:
63: Add noreplace to open_mode
64:
65: Fixed bug in adjustment of floating fields
66:
67: -----------------------------------------------------
68:
69: Cycle 6.1
70:
71: Interpretation of justification fields was screwed up.
72:
73: Fix for whitespace eating of character extractor of cycle 6 was
74: incomplete. (It might read characters when the stream was
75: in error status).
76:
77: -----------------------------------------------------
78: Cycle 6
79:
80: Make streambuf::xsgetn and streambuf::xsputn virtuals
81:
82: ios::operator int changed to ios::operator void* in order to allow
83: detection of "cin << 5" without requiring any extractor or inserter
84: to be declared in class iostream.
85:
86: sync is moved from ios to istream, the corresponding action on
87: ostreams is flushing.
88:
89: Reorder declarations in iostream.h to avoid forward enum tag
90: declarations.
91:
92: Fixes to single character extractors to make sure they skip
93: whitespace when required.
94:
95: Massive simplification of format control stuff
96:
97: struct fmtinfo goes away as do pushing and popping of it.
98:
99: several format state variables are consolodated into
100: a single flag field and new flags are added to control
101: more stuff. Remaining state variables are fill, precision and
102: width. New statevariable "flags".
103:
104: Flags declared in an enum within ios:
105:
106: enum { skipws=01,
107: /* skip whitespace on input */
108: left=02, right=04, internal=010,
109: /* padding location */
110: dec=020, oct=040, hex=0100,
111: /* conversion base */
112: showbase=0200, showpoint=0400, uppercase=01000,
113: showpos=02000,
114: /* modifiers */
115: scientific=04000, fixed=010000
116: /* floating point notation */ } ;
117:
118: Functions to manipulate the flag field
119: s.flags() return current flag
120: s.flags(b) sets flags to b
121: s.setf(b) turns on bits marked in f in flags
122: s.setf(b,f) assigns b to "field" specified by f
123: (i.e. bits that are on in f)
124:
125: static ios int members for convienent reference to fields
126: ios::basefield = hex|dec|oct ;
127: ios::adjustfield = left|right|internal ;
128: ios::floatfield = scientific|fixed ;
129:
130: New manipulators
131:
132: s << setfill(f) sets fill state variable
133: s << setprecision(p) sets precision state variable
134: s << setiosflags(b) does s.setf(b)
135: s << resetiosflags(b) does s.setf(0,b)
136:
137: New user setable state variables
138:
139: flags are a long user code may use unassigned bits
140: s.iword(x) returns a long&
141: s.pword(s) returns a void*& (sharing space with s.iword(x)
142:
143:
144: ios::bitalloc() returns a previously unallocated bit
145: ios::xalloc() returns a previously unused index
146:
147: ---------------------------------------------
148: Cycle 5
149:
150: Eliminated a lot of warnings about assigning longs to ints and
151: the like.
152:
153: Put in some overflow detection on integer input (it is still very
154: incomplete).
155:
156: Change sync_with_stdio into a static member function
157:
158: Add enum_mode, nocreate. Causes failure of an open if file does not
159: previously exist.
160:
161: Changed popfmt to reset width to 0. This is more consistent with the
162: normal use.
163:
164: Fixed some bugs in interaction of EOF eating whitespace and "ignore"
165:
166: ------------------------------------------
167:
168: Multiple Inheritance Version.
169:
170: Changes from previous version:
171:
172: MI structure in classes. Mainly this is a lot of trivial changes.
173: But one substantive change arises. Because ios is now inherited
174: as a virtual base class, a constructor with no arguments must
175: be used. Therefore ios::init(streambuf*) is declared protected and
176: must be used to initialize in derived classes.
177:
178: -------------------------------------------
179:
180: The latest version of the iostream package incorporates a large
181: number of changes and bug fixes. They are listed here in my
182: estimation of their importance.
183:
184: In principle, istream, ostream, and iostream are now distinct
185: classes. istream only contains input operations and ostream only
186: contains output operations. iostream is the "join" of the two. There
187: is a new class ios containing the common state information from which
188: all these are derived.
189:
190: This means, for example, that cin should't be passed to a function
191: expecting an iostream.
192:
193: In practice to do this would have required a good implementation of
194: multiple inheritance with virtual base classes. To avoid relying on
195: this feature of C++ all the stream classes are typedefed to ios.
196:
197: As a consequence of this change several classes derived from
198: "istream" and "ostream" have been added. Namely ifstream, ofstream,
199: istrstream and ostrstream. These (rather than the bidrectional
200: fstream and strstream) should be used when a stream for only input or
201: only output is desired.
202:
203: The kludge that used #defines and pointer variables to implement cin,
204: cour, cerr and cdebug has been eliminated. The standard streams are
205: now declared as extern variables in iostream.h. Their types are
206: classes derived from iostream with an assignment operator. So that it
207: is now permitted to assign streams to them.
208:
209: Because cfront now distinguishes int from char in overload resolution
210: cout << 'a' now outputs the character 'a' rather than the decimal
211: value. This is an incompatibility with the old stream package, but
212: is such a large improvement that I thought it was worth any
213: conversion problems it might cause. This made the manipulator
214: "onec" redundant and it has been removed.
215:
216: The name space has been cleaned up. A lot of identifiers that were
217: previously part of the global name space have been made local to a
218: class. A table of the old and new names follows. Probably the most
219: important is the renaming of open_modes.
220:
221: old name new name
222: -------- --------
223:
224: iocdebug // eliminated
225: iocerr // eliminated
226: iocin // eliminated
227: iocout // eliminated
228:
229: cdebug clog // Renamed because of
230: // complaints about old name
231:
232: state_value io_state
233: // Renamed because state_value
234: // was too unspecific
235:
236: _bad ios::badbit
237: _eof ios::eofbit
238: _fail ios::failbit
239: _good ios::goodbit
240:
241: append ios::app
242: atend ios::ate
243: input ios::in
244: output ios::out
245:
246: seek_beg ios::beg
247: seek_cur ios::cur
248: seek_end ios::end
249:
250: stream.h contains declarations of the names required for backward
251: compatibility with the stream package.
252:
253: The macros for declaring manipulator classes (IOMANIP and IOMANIP2)
254: have been replaced by a collection of macros that are more
255: "template-like". Two argument manipulators are not implemented.
256: (Users may follow the pattern in iomanip.h to implement them
257: themselves.)
258:
259: filebuf and fstream operations no longer clear errno.
260:
261: The virtual declaration of streambuf::setbuf now only has two
262: arguments. The three argument form exists in streambuf for
263: compatibility with the stream package, but the "official"
264: definition has only two arguments. Similarly the documented
265: constructor is now streambuf(char*,int).
266:
267: The members of fstream (ifstream and ofstream) that used to return an
268: int as an error indication (namely open, attach, close) now return
269: void. Errors are indicated by setting failbit in the error state.
270: There was some confusion here about whether an error was indicated by
271: returning 0 or EOF. Declaraing these functions to return void
272: eliminates the possibility of confusion.
273:
274: strstreambuf now allows setbuf in order to control sizes of
275: allocation in dynamic mode. (When character strings are being
276: automatically extended.)
277:
278: More careful checks for whether flushes are required on streams that
279: are tied to other streams. (E.g. flushes on cout when characters are
280: extracted from cin.)
281:
282: Tieing now works for insertion. E.g. cerr is tied to cout, so
283: insertion into cerr causes cout to be flushed.
284:
285: Redundant calls to allocate have been removed from streambuf::xsgetn
286: and streambuf::xsputn. (This means that the only calls to
287: streambuf::allocate from streambuf member functions are from the
288: virtuals that may be overriden in derived classes.)
289:
290: open with ios::ate (the old atend) no longer implies ios::out (the
291: old output). ios::app does. (ate is a perfectly sensible mode
292: for input.)
293:
294: eatwhite is defined for compatibility with stream package.
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.